PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • But it is targeting algae as a feedstock and uses an acid gas and ammonia extraction system to make products such as methane, hydrogen, esters and anhydrous ammonia.
http://www.w3.org/ns/prov#wasQuotedFrom
  • greentechmedia.com